40156065 has 12 divisors (see below), whose sum is σ = 69603924. Its totient is φ = 21416544.

The previous prime is 40156021. The next prime is 40156069. The reversal of 40156065 is 56065104.

It is a happy number.

40156065 is a `hidden beast` number, since 40 + 1 + 560 + 65 = 666.

40156065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 17943696 + 22212369 = 4236^2 + 4713^2 .

It is not a de Polignac number, because 40156065 - 2¹⁰ = 40155041 is a prime.

It is a super-2 number, since 2×40156065² = 3225019112568450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40156069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 446134 + ... + 446223.

It is an arithmetic number, because the mean of its divisors is an integer number (5800327).

Almost surely, 2^40156065 is an apocalyptic number.

40156065 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40156065 is a deficient number, since it is larger than the sum of its proper divisors (29447859).

40156065 is a wasteful number, since it uses less digits than its factorization.

40156065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892368 (or 892365 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 40156065 is about 6336.8813307494. The cubic root of 40156065 is about 342.4393911258.

The spelling of 40156065 in words is "forty million, one hundred fifty-six thousand, sixty-five".